With Mantle in Crossfire it seems to run better now and I get more FPS but after playing for 5-6 mins it begins to intermittently freeze for a split second over and over and becomes unplayable. Come on AMD what do I do? Do you guys still need to optimize the 7 series for mantle or does Dice have to do it?

No there is not one there. I thought that file is to set custom settings? I dont believe there is a default file in the game. Not that I know of.

I believe the problem is the vram for the video card. I have 2 x 7950's in crossfire and when I watch the usage it starts to stutter and freeze when it gets to 2880 mb used out of the 3gbs. It seems to max out at 2994. It may be an issue with crossfire and vram over usage. I'm not sure though. I'm going to test again and see how much is used when it starts to stutter freeze. I will post back in a bit.

It is so curious that you mention that... I had the same feedback last night from friends using Cat.14.2 beta on single GPU/display: "all seems fine at the beggining but then it degenerates to worst performance".

On my side, a bad experience - DX11 performs worst (15-30 FPS less) and Mantle is very bad (<35 FPS). Considering that AMD reckons Mantle for R9280X GPU´s are still under improvements I didn´t carry too many expectations!

I was testing out the stability of the drivers today in a round of BF4:second assault. I am running HIS 7970 xfire (one vanilla and one ICE Qx2) and i was seeing improved fps within the first 2 minutes. Around the 4th minute in i had a crash. The game froze up. Error message popped up stating it was a GPU error d3d. I tried to run the game again on a different map and it crashed again. I had no issues playing ESO beta,but that game isn't supporting xfire yet. Diablo 3 ran fine for the 10 minutes i had it up. So anyone running xfire i don't know if its a wise move to install these drivers yet. While they will work with cfire now,they dont seem stable enough yet, at least for me. I've rolled back to 13.12 for now.